Pushline!

AirDroid allows you to access and manage your Android phone or tablet from Windows, Mac or the web, wirelessly, for free.

To sum it up, you can:

AirMore is a cross-platform tool to access mobile devices wirelessly over the web. It can transfer Android and iOS device files to PC and vice versa.

With Mobizen you can control your Android device using a web browser, both via USB both via WiFi.

Pushover is a simple push notification service that integrates easily into web apps, network monitoring systems, shell scripts, and anything else that needs to send alerts to your mobile devices.

Free open source push notifications

DeskCon integrates your Android Device in the Desktop. Receive Notifications, Files and Commands from your mobile Device on your Desktop PC. The Data is send over a secure TLS Connection. The Connection is encrypted and authenticated with self-signed Certificates (RSA-2048 PK).

QPush is a free service that lets you easily push text and links from PC to iPhone. No need to send emails to yourself or wait for Evernote to sync anymore!

Share clipboard with PC and transform android notifications to desktop notifications

SMS from PC - Send and receive text messages from any browser using your current android phone.

https://www.youtube.com/watch?v=knmNvtXflOQ

CellSend is a free service that allows you to send texts from your computer to your phone in a fast and easy way.

The Panacea application is a free download and it allows you to send messages quickly and easily via an HTTP request into the application. It support iOS, Android and Blackberry.

PAW Server is a Web Server for Android devices.With the PAW webserver you can use the functionality of your phone from a web browser, serve your own web pages or develop phone enabled web applications.